#include <iostream>
#include <fstream>

using namespace std;

ifstream f("rucsac.in");
ofstream g("rucsac.out");

int n, gmax, dp[10005], gcur, vcur;

void creare_matrice() {
    f >> n >> gmax;
    for (int i = 1; i <= n; ++i) {
        f >> gcur >> vcur;
        for (int j = gmax; j >= gcur; --j)
            dp[j] = max(dp[j], dp[j - gcur] + vcur);
    }
}

int main() {
    creare_matrice();
    g << dp[gmax];
    return 0;
}